Manual vs March

Manual

name
  • A male given name from Spanish: a rare spelling variant of Manuel, sometimes considered erroneous. 

March

name
  • A male given name from English. 

  • A market town and civil parish with a town council in Fenland district, Cambridgeshire, England (OS grid ref TL4196). 

  • The third month of the Gregorian calendar, following February and preceding April. Abbreviation: Mar or Mar. 

  • A surname from Middle English for someone born in March, or for someone living near a boundary (marche). 

How often have the words Manual and March occurred in a corpus of books? (source: Google Ngram Viewer )